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Chronological Study of Antibiotic Resistances and Their Relevant Genes in Korean Avian Pathogenic Escherichia coli Isolates
A chronological analysis demonstrated significant and continuous increases in the frequencies of resistances to several antibiotics and of the relevant resistance genes (tetA, strA-strB, and TEM), mutations in gyrA and parC, and multidrug-resistant APEC strains during the period 2000 to 2005. Expand
Characterization of a Recombinant Newcastle Disease Virus Vaccine Strain
KBNP-C4152R2L is a promising vaccine strain and viral vector in terms of antigenicity, productivity, safety, and pathogenic stability. Expand
Genomic sequence of an antigenic variant Newcastle disease virus isolated in Korea
The antigenicity of KBNP-4152 was distinct from La Sota, and the expected genome size was 15,192 nt, as was the case with other recent virulent ND viruses analyzed. Expand
Variation of a Newcastle Disease Virus Hemagglutinin-Neuraminidase Linear Epitope
ABSTRACT Fifty-six Newcastle disease virus strains collected from 2000 to 2006 could be grouped into subgenotype VIId. However, they displayed cumulative mutations in and around the linear epitope ofExpand
Molecular epizootiology of recurrent low pathogenic avian influenza by H9N2 subtype virus in Korea
The results suggest that the recurrent viruses are progeny of the early Korean H9N2 isolates, but further studies are required to explain their phylogenetic relatedness to viruses in China. Expand
Pathogenicity of SG 9R, a rough vaccine strain against fowl typhoid.
SG 9R inoculation to 1-day-old male brown layer chicks per os following starvation successfully reproduced fowl typhoid in the present study, suggesting that the LPS defect may be one of the major mechanisms of SG 9R attenuation, and the possession of intact SPI-2, spvC, B, A, and R virulence genes may be associated with residual SG9R virulence. Expand
Reproduction of Fowl Typhoid by Respiratory Challenge with Salmonella Gallinarum
This study represents the first reproduction of fowl typhoid via respiratory route, and the findings may be useful for understanding the transmission of Salmonella Gallinarum in the field. Expand
Molecular epizootiology of infectious bursal disease (IBD) in Korea
A molecular epizootiological study of infectious bursal disease in Korea by analyzing 85 IBD viruses obtained from vaccinated or unvaccinated flocks revealed more genetic and phenotypic diversity of IBDV in Korea than has been reported previously. Expand
Molecular epidemiology of Newcastle disease in Republic of Korea.
The results suggest that the genotype VIf strains have been maintained by enzootic infections during the past decade, while genotype VIIa appears to be introduced more recently in Republic of Korea. Expand
Characterization of a T7-Like Lytic Bacteriophage (φSG-JL2) of Salmonella enterica Serovar Gallinarum Biovar Gallinarum
ABSTRACT φSG-JL2 is a newly discovered lytic bacteriophage infecting Salmonella enterica serovar Gallinarum biovar Gallinarum but is nonlytic to a rough vaccine strain of serovar Gallinarum biovarExpand